Statement I : We can not produce a real image by plane (or) convex mirrors under any circumstances 
Statement II: The focal length of a convex mirror is always taken as positive 

Statement – I is true, statement – II is true statement – II is correct explanation statement – I

Statement – I is true, statement – II false

Statement – I is false, statement – II is true

Statement – I is true, statement – II  true statement – II is not correct explanation for statement – I