The above diagram shows some stages in microgametogenesis. Identify \( \mathrm{A}, \mathrm{B} \)...

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The above diagram shows some stages in microgametogenesis. Identify \( \mathrm{A}, \mathrm{B} \) and \( \mathrm{C}- \)
\( \begin{array}{ccll} & \text { A } & \text { B } & \text { C } \\ \text { (a) } & \text { Symmetric spindle } & \text { Generative cell } & \text { Vegetative cell } \\ \text { (b) } & \text { Symmetric spindle } & \text { Vegetative cell } & \text { Generative cell } \\ \text { (c) } & \text { Asymmetric spindle } & \text { Vegetative cell } & \text { Generative cell } \\ \text { (d) } & \text { Asymmetric spindle } & \text { Generative cell } & \text { Vegetative cell }\end{array} \)
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