Step 1: Recall the food groups:
A balanced meal uses foods from five groups.
These are cereals, grains and products; pulses and legumes; milk and milk products (with flesh foods); fruits and vegetables; and fats and sugar.
To find the missing group, we list what the menu gives and tick the groups one by one.
Step 2: List what the menu supplies:
A grilled sandwich is made of bread, and bread is a cereal product.
The usual filling has vegetables like tomato, onion and cucumber, plus butter or cheese.
A milkshake is made of milk with sugar added, so it adds a milk product and sugar.
Step 3: Compare with the five groups:
Cereals: present (bread).
Milk products: present (milkshake, cheese).
Fruits and vegetables: present (sandwich filling).
Fats and sugar: present (butter, cheese, sugar in the shake).
Nothing in the menu gives dal, beans, chickpeas, rajma or sprouts. So pulses and legumes are the missing group.
Step 4: Why the other options are wrong:
(A) is wrong because the bread already gives cereals.
(C) is wrong because the vegetable filling gives this group.
(D) is wrong because butter, cheese and the sugar in the milkshake supply fats and sugar.
Final Answer:
The menu has no pulses or legumes, so option (B) is the answer.
\[ \boxed{\text{(B) Pulses and legumes}} \]