Q. An npn BJT has gm=38mA/v, cμ =10^¯14 F, cπ =10^¯13F and DC current gain β0=90. For this transistor fT & fβ are

• (A) fT =1.64 x 10⁸ Hz & fβ = 1.47 x 10¹⁰ Hz.
• (B) fT =1.47 x 10¹⁰ Hz & fβ = 1.64 x 10⁸ Hz
• (C) fT =1.33 x 10¹² Hz & fβ = 1.47 x 10¹⁰ Hz
• (D) fT =1.47 x 10¹⁰ Hz & fβ = 1.33 x 10¹² Hz