Concept:
Patdeep is an important raga of Hindustani music.
It is generally associated with Kafi thaat and has a characteristic melodic movement.
Step 1: Check statement A.
Patdeep belongs to Kafi thaat.
So, A is correct.
Step 2: Check statement B.
In this context, Patdeep has:
\[
\text{Vadi} = P
\]
\[
\text{Samvadi} = S
\]
So, B is correct.
Step 3: Check statement C.
Patdeep is not an early morning raga.
It is generally rendered in the afternoon.
So, C is incorrect.
Step 4: Check statement D.
The phrase:
\[
G\ M\ P\ N,\ D\ N\ S\ D\ P
\]
is important in Patdeep.
So, D is correct.
Step 5: Final conclusion.
The correct statements are:
\[
A,\ B,\ D
\]
Hence:
\[
\boxed{\text{(A) A, B and D only}}
\]