To determine which option best describes \(X\) and \(Y\) according to the given table, we need to consider the entries in the table related to the form of bacteria and their corresponding shapes and associated diseases.
The table is as follows:
[tex]\[
\begin{array}{|l|c|c|}
\hline
\text{Form} & \text{Shape} & \text{Associated disease} \\
\hline
\text{Coccus} & X & \text{Strep throat} \\
\hline
\text{Bacillus} & \text{Rod shaped} & Y \\
\hline
\text{Spirillum} & \text{Spiral} & \text{Cholera} \\
\hline
\end{array}
\][/tex]
From the table:
1. The form 'Coccus' has shape denoted by \(X\) and is associated with 'Strep throat'.
2. The form 'Bacillus' has a 'Rod shaped' structure and is associated with \(Y\).
3. The form 'Spirillum' has a 'Spiral' shape and is associated with 'Cholera'.
Given our choices:
1. \(X = \text{Spherical}; Y = E.\text{ coli}\)
2. \(X = \text{Comma shaped}; Y = \text{Whooping cough}\)
3. \(X = \text{Oval shaped}; Y = S.\text{aureus}\)
4. \(X = \text{Rod shaped}; Y = \text{Pneumonia}\)
The most appropriate match for \(X = \text{Spherical}\) and the disease \(Y = E. \text{coli}\) is derived from the logical filling of the table:
- Coccus bacteria are indeed spherical in shape.
- Bacillus bacteria, which are rod-shaped, are matched with \(Y\), which in this case, the associated disease fits E. coli.
After considering the matching conditions and descriptions, the correct details are:
- \(X\) best describes 'Spherical' (Coccus).
- \(Y\) best describes 'E. coli' (Bacillus).
Thus, the best description is:
\(X = \text{Spherical}; Y = E.\text{coli}\)
The correct answer is 1.
