Question
If $\mathrm{a}, \mathrm{b}, \mathrm{c}$ are in $\mathrm{AP}$ and $\mathrm{a}, \mathrm{mb}, \mathrm{c}$ are in GP, then $\mathrm{a}, \mathrm{m}^{2} \mathrm{~b}, \mathrm{c}$ are in(a) AP(b) $\mathrm{GP}$(c) HP(d) AGP
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