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  1. The distance between the centres of the two circles of radii r1 and r2 is d. They will touch each other internally if
    1. d = r1 or r2
    2. d = r1 + r2
    3. d = r1 – r2
    4. d = √r1r2
Correct Option: C

According to question , we can draw a figure

Hence , option C is correct answer .


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