Q: 139 (SSC/NA)
question_subject:
Science
question_exam:
SSC
stats:
0,8,2,8,2,0,0
keywords:
{'h5n1': [1, 0, 1, 0], 'virus': [4, 0, 0, 1], 'h1n5': [1, 0, 0, 0], 'h4n2': [2, 0, 0, 0], 'h2n3': [2, 0, 0, 0], 'human beings': [4, 1, 0, 2], 'combinations': [2, 1, 0, 2]}
The correct answer is option-1 H5N1.
Option-2 H1N5 and option-4 H4N2 are not valid because the first number in the combination represents the subtype of the virus`s hemagglutinin protein (H), and according to the naming convention, there is no H1N5 or H4N2 subtype.
Option-3 H2N3 is also not correct as the H2N3 subtype is not known to be contagious to human beings.
Therefore, option-1 H5N1 is the only valid combination that represents a subtype of the influenza virus that is contagious to human beings.