**Question:** Temperature for brazing is

A. 900°C
B. 1000°C
C. 1200°C
D. 1500°C

**Core Concept:**
Brazing is a welding process that joins two or more materials together using a filler material that melts at a lower temperature than the base materials. The correct temperature for brazing depends on the specific materials being joined, as different materials have varying melting points.

**Why the Correct Answer is Right:**
The correct answer, **C. 1200°C**, is the temperature required for brazing when the base materials have a melting point above 900°C, but below 1200°C. In this case, the filler material melts at a lower temperature than the base materials, allowing them to be joined together.

**Why Each Wrong Option is Incorrect:**
A. 900°C (Option A) is too low for brazing, as it is lower than the melting points of many common base materials.
B. 1000°C (Option B) is too high for brazing, as it is higher than the melting points of many base materials and can cause excessive heat input, leading to thermal degradation of the base materials.
D. 1500°C (Option D) is too high for brazing, as mentioned above, and can cause thermal degradation of the base materials. Additionally, this temperature range is more suitable for arc welding, not brazing.

**Clinical Pearl:**
When selecting a brazing temperature, it is essential to consider the melting points of both the base materials and the filler material. The chosen temperature should be within the appropriate range for brazing (1200°C) while avoiding temperatures that are too low or high for the specific materials being joined. This ensures proper bonding and prevents thermal degradation of the base materials.