**Explanation:**

To understand why the ohmmeter reading between the other transistor terminal should be low resistance, let's first discuss the characteristics of an NPN transistor.

**NPN Transistor:**
An NPN transistor is a three-layer semiconductor device consisting of a thin middle layer called the base sandwiched between two outer layers called the emitter and collector. The emitter is heavily doped with an excess of electrons, making it an n-type material. The collector is lightly doped, making it a p-type material. The base is lightly doped as compared to the emitter and collector, making it a p-type material.

**Transistor Terminal Connections:**
When using an ohmmeter to measure the resistance between the transistor terminals, it's important to understand their connections. The positive probe of the ohmmeter is connected to the base terminal of the NPN transistor, while the negative probe is connected to one of the other terminals.

**Ohmmeter Reading:**
The ohmmeter measures the resistance between the two terminals it is connected to. In this case, the ohmmeter reading is between the base terminal (positive probe) and the other terminal (negative probe).

**Explanation:**

Now, let's analyze the possible options:

a) Open: If the ohmmeter reading is open, it means there is no continuity between the base and the other terminal. This indicates that the transistor is not functioning properly, as there should be some conductivity between these terminals.

b) Infinite: If the ohmmeter reading is infinite, it means there is extremely high resistance between the base and the other terminal. This would imply that no current can flow between these terminals, which is also not desirable for a functioning transistor.

c) Low resistance: The correct answer. A low resistance reading indicates that there is a good conductivity between the base and the other terminal. This is the expected behavior of an NPN transistor when the positive probe is connected to the base terminal. The low resistance suggests that current can flow between the base and the other terminal, allowing the transistor to function properly.

d) High resistance: If the ohmmeter reading is high resistance, it suggests that there is a limited conductivity between the base and the other terminal. This would imply that the transistor may not function properly or that there is some issue with the connection.

Therefore, the correct answer is option C - the ohmmeter reading between the other transistor terminal should be low resistance.