Herbarium contains preserved plant specimen.

Concept: The above-given statement is true.

• Herbarium is a collection of the parts of plants or the entire body of the plant. 
• These plants are collected to carry on the scientific research related to them. 
• Herbarium consists of the preserved plant specimens along with their associated data. These plants are dried and mounted on sheets. 
• This information can include the location where they are most commonly found, their habitat and their fruiting periods.

Hence, A is the correct option.