(d) has been suffering
Heena has been suffering from fever since last Sunday. The phrase "since last Sunday" indicates an action that started in the past and continues to the present, requiring the present perfect continuous tense.
The key indicator here is "since last Sunday" — whenever "since" is used to show a point of time from which an action began and is still continuing, we use Present Perfect Continuous (has/have + been + V-ing). The other options are wrong: "suffered" is simple past (completed action), "will suffer" is future, and "suffer" is simple present.