Correct Answer - Option 3 : 9

**Given**

79874W6 is divisible by 4.

**Formula used**

As per the divisibility rule of 4, any number is divisible by 4 if number forming by last two digits of the given number is divisible by 4 i.e W6 should be divisible by 4.

**Calculation**

⇒ Now we have to check for what value of W, W6 will be divisible by 4.

⇒ Clearly W can have values : 1, 3, 5, 7, 9.

⇒ Among the following values 9 is the highest

∴ maximum value of W is 9