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Consider the following in respect of nat...

Consider the following in respect of natural numbers a, b and c:
1. LCM (ab, ac) = a LCM(b, c)
2. HCF(ab, ac) = a HCF(b, c)
3. HCF (a, b) `lt` LCM (a, b)
4. HCF (a, b) divides LCM(a, b).
Which of the above are correct?

A

1 and 2 only

B

3 and 4 only

C

1, 2 and 4 only

D

1, 2, 3 and 4

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