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An $\text{npn}$ transistor has a beta cut-off frequency $f \beta$ of $1 \mathrm{MHz}$, and common emitter short circuit low frequency current gain $\beta \mathrm{O}$ of $200$.It unity gain frequency $f \mathrm{~T}$ and the alpha cut-off frequency $f \alpha$ respectively are

1. $200 \mathrm{MHz}, 201 \mathrm{MHz}$
2. $200 \mathrm{MHz}, 199 \mathrm{MHz}$
3. $199 \mathrm{MHz}, 200 \mathrm{MHz}$
4. $201 \mathrm{MHz}, 200 \mathrm{MHz}$