Q. Diploid spores are produced only by

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Solution:

Rust causing fungi such as Puccinia produce diploid spore-like teleutospores in its life cycle. Telutospore is a thick-walled perennating spore produced by Puccinia in its primary host wheat. This spore can survive for long duration in soil and germinate to form basidia which produce haploid basidiospores by meiosis.