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In each of the following questions, find out which of the answer figures `(A), (B), (C)` and `(D)` c
Complete the following general food chain
by filling missing elements;
In the left column are given problem figures and in the right hand column the answer figures. Pickup
Arrange the following countries
according to their coal reserves
A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 time
'Blood fluke' is the common name of
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