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Q.
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
does not change with time
b
increases and decreases linearly with time
c
varies periodically with time
d
is parallel to the direction of propagation
answer is B.
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