Concept:
In the traditional Indian seasonal system (Ritu Chakra), the year is divided into six seasons (Ritus), and each season consists of two lunar months.
Vasant Ritu (Spring season) is associated with pleasant weather, flowering, and renewal in nature. It is considered highly favorable for health and yogic practices.
Step 1: Recall the months included in Vasant Ritu.
According to the traditional Indian calendar:
\[
\text{Vasant Ritu} = \text{Chaitra + Vaishakha}
\]
Thus:
\[
\text{Chaitra} \rightarrow \text{Included}
\]
\[
\text{Vaishakha} \rightarrow \text{Included}
\]
Step 2: Analyze the remaining months.
Ashvina
This month belongs to Sharad Ritu (Autumn season).
\[
\Rightarrow \text{Not included}
\]
Kartika
Kartika is also associated with Sharad/Hemanta transition, not Vasant.
\[
\Rightarrow \text{Not included}
\]
Falguna
Falguna belongs mainly to Shishira Ritu (Late winter).
\[
\Rightarrow \text{Not included}
\]
Step 3: Select the correct combination.
The months included in Vasant Ritu are:
\[
B, D
\]
Thus:
\[
\boxed{B, D \text{ Only}}
\]
Step 4: Identify the correct option.
The option matching the correct combination is:
\[
\boxed{\text{B, D Only}}
\]
Hence, the correct answer is:
\[
\boxed{(A)}
\]