discuss-forum?question_id=205940-BD-Merit-Freelancing,-BCS,-Bank,-Primary,-Admission,-NTRCA

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1.

A. $\frac{D}{d λ}$
B. $\frac{D}{d λ}$
C. $\frac{D}{d λ}$
D. $\frac{D}{d λ}$

Answer: Option B

Explanation:

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