there is any problm in this app. i choosed all tha options one by one bt this shows mee wrong answer every time...

Answer 1

Maybe you chose wrong/miss typed.

Answer 2

yes. you are right

Answer 3

there might be multiple answer for it

Answer 4

it happened with me then I understood

Answer 5

That's a multiple answer question ...

Answer 6

Can you tell us the question?

Answer 7

answer ?

Answer 8

There's nothing wrong with the app, in fact I just finished the Basic Concepts a while ago. You're most likely hitting the wrong answer.