Question

Choose the odd-one out among the given four options.

• A. $3-12$
• B. $4-20$
• C. $7-63$
• D. $6-42$

Answer 1

The correct option is C $7-63$

In each pair apart from option $D,$ second term is first term $\times$ (first term $+1).$
Hence, option $D$ is the correct answer.