MCQ
If $a + 2b + 3c = 12 , (a, b, c \in R+),$ then $ab^2c^3$ is:
- A$\geq2^3$
- B$\geq2^6$
- ✓$\leq2^6$
- D$\text{None}\text{ of}\text{ these}$
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Then $\left(\frac{\mathrm{AM} \cdot \mathrm{BN}}{\mathrm{CD}}\right)^2$ is equal to...........