Option D: _cauliflower is tastier than cabbage_.
         ○ Let's analyze the given statements:
       1. Lady's finger is tastier than cabbage.
       2. Cauliflower is tastier than lady's finger.
       3. Cabbage is not tastier than peas.
         ○ From statement 1, we know: Lady's finger > Cabbage.
         ○ From statement 2, we know: Cauliflower > Lady's finger.
         ○ Combining statements 1 and 2, we get: Cauliflower > Lady's finger > Cabbage.
         ○ From statement 3, we know: Peas ≥ Cabbage.
         ○ Now, let's evaluate the options:
       ● Option A: Peas are as tasty as lady's finger.  
             ○ This cannot be concluded because we only know that peas are not less tasty than cabbage, and we have no direct comparison between peas and lady's finger.
       ● Option B: Peas are as tasty as cauliflower and lady's finger.  
             ○ This cannot be concluded because we have no information comparing peas directly with cauliflower or lady's finger.
       ● Option C: Cabbage is the least tasty of the four vegetables.  
             ○ This is possible but not definitively concluded because peas could be equally as tasty as cabbage.
       ● Option D: Cauliflower is tastier than cabbage.  
             ○ This is directly supported by combining statements 1 and 2, which show that cauliflower is tastier than both lady's finger and cabbage.
         ○ Therefore, the most logical conclusion based on the given statements is that cauliflower is tastier than cabbage.