In each of the following equations. Select the missing number from the given responses.

Options

A. 15
B. 5
C. 6
D. 3

Answer

A

Explanation

Subtract the second number from the first number and add the resultant to the third number to get the lowermost number in each column.
first column
`8-6+2=2+2=4`
Second column
`12-5+8=7+8=15`
Third column
`13-10+?=18`
`rArr?=18-3=15`