Consider the following statements regarding Leishmania donovani, the causative agent of Kala-azar:\n1. It is a dimorphic parasite that exists as flagellated promastigotes in the sandfly vector and non-flagellated amastigotes in human macrophages.\n2. The diagnostic stage in human bone marrow aspirates is the flagellated promastigote stage.\n3. It primarily targets the reticuloendothelial system, leading to splenomegaly and hepatomegaly.\nWhich of the statements given above are correct?

Options:

• A: 1 and 2 only
• B: 1 and 3 only
• C: 2 and 3 only
• D: 1, 2 and 3

Related Practice Questions:

• Let $S_1$ and $S_2$ be two disjoint, non-empty convex sets in $\mathbb{R}^n$. Under which of the following conditions is there guaranteed to exist a hyperplane that strictly separates $S_1$ and $S_2$?
• Let the primal linear programming problem be: Maximize $Z = c^T x$ subject to $Ax \le b, x \ge 0$. If this primal problem has an unbounded optimal objective value, then which of the following statements is always true regarding its dual problem?
• Let $S = \{(x, y) \in \mathbb{R}^2 \mid x^2 + y^2 \le 9\}$ be a convex set in $\mathbb{R}^2$. The set of all extreme points of $S$ is given by:
• In a linear programming problem with $3$ independent equality constraints and $5$ variables (including slack/surplus variables), what is the maximum possible number of basic solutions?