The hair type known as 'bagh ka hair' or tiger's hair refers to offset hair. Offset hair is characterized by a unique pattern where the scales on the hair shaft are offset or staggered, resembling the texture and appearance of tiger hair. This type of hair has distinctive properties used to describe such patterned hair types.
The other types of hair:
- Woolly hair refers to tightly coiled or curly hair.
- Tandem hair refers to hair arranged in pairs or groups, different from offset.
Hence, the correct answer is Offset hair.