Explanation:

- The sentence talks about the ongoing terrorism issues in Sri Lanka and suggests a problem with intelligence networks.

- Presence of a ……. more terrorists: Implies the existence of additional terrorists.

- With a large …… of arms and ammunition: Suggests they have a significant supply or stockpile.

- After the Easter Day ……..: Refers to an incident such as an attack or bombing.

- Considering the intelligence network, there is an issue suggested by options, denoting inefficiencies or flaws in operations.

- Option 1 - Inefficient: Indicates the intelligence network isn’t functioning effectively.

- Option 2 - Clumsy: Implies awkwardness, not as suitable for an intelligence network.

- Option 3 - Bogus: Suggests the network is fake, which may be too severe in the context.

- Option 4 - Awkward: More about difficulty in social situations, less about effectiveness.

- Correct Answer: Option 1 - Inefficient. This best fits the sentence's context about intelligence network issues.