A) P
B) Bi
C) Sb
D) As
Correct Answer: B
Solution :
Phosphorus exists in a number of allotropic forms such as white phosphorus, red phosphorous, scarlet phosphorus, metallic or \[\alpha -\]black phosphorus, \[\beta -\]black phosphorus and violet phosphorus. Arsenic exists in three allotropic forms such as grey, yellow and black. Similarly, antimony exists in three different forms such as metallic form, yellow or \[\alpha -\]antimony and black or\[\beta -\]antimony. Bismuth does not exhibit allotropy.
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