For a PNP transistor, α = αR = 0·9 and ICO = 10 µA the

For a PNP transistor, α = α_R = 0·9 and I_CO = 10 µA the value of I_CEO will be—

Given, α = α_R = 0·9
I_CO = 10 µA
ICEO =?

We know that, I_CEO = (1 + β) I_CO =		1 +	α		I_CO
			1 – α

or I_CEO =		1 +	0.9		I_CO
			1 – 0.9

= 10 × 10 µA = 100 µA
Hence alternative (D) is the correct choice.