Which of the following is the correct syntax for using the useEffect() hook with a cleanup function to start a timer?AuseEffect(() => {   const timer = setInterval(() => {                             setCount(count + 1)                             }, 1000);   return clearInterval(timer)}, [])BuseEffect(() => {   const timer = setInterval(() => {                             setCount(count + 1)                             }, 1000);   return () => clearInterval(timer)}, [])CuseEffect(() => {   const timer = setInterval(() => {                             setCount(count + 1)                             }, 1000)                         }, [count];   return clearInterval(timer))DuseEffect(() => {   const timer = setInterval(() => {                             setCount(count + 1)                             }, 1000)                         }, [count];return () => clearInterval(timer))

What is the correct syntax of useEffect cleanup function?AuseEffect(() => {   // effect   return () => {       // cleanup   }}, [input])BuseEffect(() => {   // effect   // cleanup   return () => {   }}, [input])CuseEffect(() => {   // effect   return () => {   }}, cleanup, [input])DNone of the above

The useEffect cleanup is a function in the useEffect Hook that allows us to tidy up our code before our component unmounts. When our code runs and reruns for every render, useEffect also cleans up after itself using the cleanup function. Which of the foloowing is the correct Pseudo code for  it?AuseEffect(() => {       //effect      //cleanup   }, [input])BuseEffect(() => {      // effect        }, [cleanup])CuseEffect(() => {       effect       return () => {           cleanup       }   }, [input])DNone of the above

What happens if the cleanup function in the useEffect() hook returns a function?AThe returned function is ignoredBThe returned function is called before the effect runsCThe returned function is called after the effect runs and before the component unmountsDThe returned function is called after the component unmounts

Which of the following code subscribes to the user in useEffect and then signout him in useEffect cleanup?AuseEffect(() => {   // set our variable to true   let isSubscribed = true;   get(API).then((response) => {       if (isSubscribed) {           // handle success       }   });   return () => {       // cancel the subscription       isSubscribed = false;   };}, []);BuseEffect(() => {   // set our variable to true   let isSubscribed = true;   get(API).then((response) => {       if (isSubscribed) {           // handle success       }   });   return () => {       // cancel the subscription       isSubscribed = true;   };}, []);CuseEffect(() => {   // set our variable to true   let isSubscribed = true;   get(API).then((response) => {       if (isSubscribed) {           // handle success       }   });}, []);DuseEffect(() => {   // set our variable to true   let isSubscribed = true;        if (!isSubscribed) {           // handle success       }      return () => {       // cancel the subscription       isSubscribed = true;   };}, []);

What is the syntax for the useEffect() hook in React, when you want to run a function inside the useEffect only when the app loads?AuseEffect(() => {}, []);BuseEffect(() => {}, [stateVariable]);CuseEffect(() => {});DAll of the above