The 1st and the last part of sentence are numbered 1 and 6. The rest of the sentence is split into ur parts and named. P.Q.R, and S. These four parts are not given in their proper order. Read the sentence and find out which of the four combinations is correct. Then find the correct answer and indicate it in the answer Sheet.
1. Right from
P. have been used as a measure of time
Q. prehistories times
R. and have formed the basis of
S. the phases of the moon
6. the earliest calendar
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