Assertion (A): \( \mathrm{Zr}-\mathrm{Hf}, \mathrm{Nb}-\mathrm{Ta}, \mathrm{Mo}-\mathrm{W}, \ldo...
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Assertion (A): \( \mathrm{Zr}-\mathrm{Hf}, \mathrm{Nb}-\mathrm{Ta}, \mathrm{Mo}-\mathrm{W}, \ldots . ., \mathrm{Pd}-\mathrm{Pt}, \mathrm{Ag}-\mathrm{Au} \) आदि युग्मों की परमाणु त्रिज्या लगभग समान होती है।
Reason (R): लैन्थेनॉयड संकुचन \( \mathrm{Hf} \) से \( \mathrm{Hg} \) तक परमाणु त्रिज्या में होने वाली वृद्धि को निरस्त कर देता है।
(A) Both A and R are true and R is the correct explanation of A.br(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(E) Both A and R are false.
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