Explanation

From the given information:

1. A reaches before B → A < B

2. B reaches before D → B < D  

3. C reaches before D → C < D

Combine 1 and 2: A < B < D  

Combine with 3: C < D

So D is after both B and C. That means D cannot be last because someone is definitely behind D? Wait no — "last" means finishes after everyone.

From A < B < D, D is after A and B.  

From C < D, D is after C too.

So D finishes after A, B, and C.  

Therefore D certainly finishes last.

Last verified on 03-09-2026

Explanation

A comes before B.

B comes before D, and C also comes before D.

Therefore, D must be the last to reach.

Last verified on 02-09-2026

Explanation

The statement “Doctors are not illiterate” means all doctors are literate.

Sana is illiterate.

Therefore, Sana cannot be a doctor.

Last verified on 02-09-2026

Explanation

The contrapositive of “If P, then Q” is “If not Q, then not P.”

A statement and its contrapositive are logically equivalent.

Last verified on 02-09-2026

Explanation

Let's place them one by one:

1. Lahore is not to the East of Karachi

   So Lahore is West / North-West / South-West of Karachi.

2. Islamabad is to the North of Lahore 

   So Islamabad is directly North of Lahore.

3. Peshawar is to the West of Islamabad 

   So Peshawar is West of Islamabad.

Now combine:  

Karachi → Lahore is somewhere West.  

Lahore → Islamabad is North.  

Islamabad → Peshawar is West.  

So from Karachi, go West to Lahore area, then North to Islamabad, then West again to Peshawar.

That puts Peshawar to the North-West of Karachi.

Last verified on 02-09-2026