The type of germplasm, which is frequently utilized by breeders for their crop improvement Programme, is called as

Correct option is B

✅ (b) Working collection [Breeding-Ready Germplasm] • A working collection includes accessions actively used by breeders in ongoing crop improvement programs. • These are readily available, evaluated materials maintained for short to medium term use. • Often regenerated more frequently due to regular utilization. • It’s a subset of active or base collections curated for practical application.
❌ (a) Long-term collection • Stored under deep freeze conditions in gene banks (e.g., -18°C). • Meant for conservation, not for frequent use.
❌ (c) Base collection • Refers to original, genetically diverse accessions stored for long-term conservation. • Used more for preserving genetic variability, not routine breeding.
❌ (d) Active collection • Contains materials that are multiplying or being evaluated, but not all are immediately used by breeders.