**Core Concept**
Fungi are classified based on their reproductive cycles, which include both sexual and asexual phases. The absence of a sexual cycle in fungi is a key characteristic used in their classification.

**Why the Correct Answer is Right**
Fungi without a sexual cycle are grouped under the category of **Deuteromycota** (also known as Fungi Imperfecti). This group consists of fungi that reproduce only through asexual means, such as conidia or spores. They lack a clearly defined sexual cycle, making them distinct from other fungal groups like Ascomycota and Basidiomycota.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the classification of fungi based on their reproductive cycles.
**Option B:** Ascomycota is a group of fungi that exhibit a sexual cycle, characterized by the production of ascospores within an ascus.
**Option C:** Basidiomycota is another group of fungi that exhibit a sexual cycle, characterized by the production of basidiospores on a basidium.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the classification of fungi is based on their reproductive cycles, which can be asexual or sexual. Understanding the different groups of fungi helps in identifying and treating fungal infections more effectively.

**Correct Answer:** D. Fungi without sexual cycle are grouped under Deuteromycota.