Correct answer: (A) The sequence is not equicontinuous.
Explanation
For every fixed x, f_n(x)→0, including x=0. However f_n(1/n)=1 while f_n(0)=0, despite 1/n→0. This violates equicontinuity and uniform convergence. Every subsequence still has supremum 1 and pointwise limit zero, so no uniformly convergent subsequence exists. **A**.
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