The quark content of proton and neutron are respectively

Options

A. udd,udd
B. uud,udd
C. uuu,ddd
D. udd,uud

Answer

To determine the quark content of the proton and neutron, we need to understand the composition of these particles in terms of quarks.

### Step 1: Identify the quark content of a proton
A proton is made up of three quarks:
- 2 up quarks (u)
- 1 down quark (d)

Thus, the quark content of a proton can be represented as:
\[ \text{Proton (p)} = uud \]

### Step 2: Identify the quark content of a neutron
A neutron is also made up of three quarks:
- 1 up quark (u)
- 2 down quarks (d)

Thus, the quark content of a neutron can be represented as:
\[ \text{Neutron (n)} = udd \]

### Step 3: Summarize the quark content
- The quark content of a proton is \( uud \).
- The quark content of a neutron is \( udd \).

### Final Answer
The quark content of proton and neutron are respectively:
- Proton: \( uud \)
- Neutron: \( udd \)