`{:(7,6,15),(10,?,12),(35,12,90):}`

Options

A. 9
B. 4
C. 25
D. 11

Answer

B

Explanation

स्तंभ के अनुसार
`(7 xx 10)/(2) = 35`
`(6 xx ?)/(2) = 12 rArr ? = (12)/(3) = 4`
`(15 xx 12)/(2) = 90`