A) 'a' is the point when she started warm up exercises.
B) 'b' is the point when she started running.
C) 'c' is the point when she started running.
D) 'd' is the point when she stopped running.
Correct Answer: C
Solution :
Heart beats about 72 times per minute at rest. In the graph, the heart beats are 72 /min upto point 'b' and then increase gradually upto point 'c'. Thus 'b' is the point when she started light warm up exercises. 'c' is the point when she started running as heart beat increases subsequently. Heart beat starts decreasing from point 'e' thus point 'e' is when she stopped running.
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