A. लैंड लाइन
B. डायल अप सर्विस
C. डिजिटल सब्सक्राइबर लाइन
D. केबल मॉडम

Solution

B. Dial up service

Explanation

<p>a. Land line – This is just a telephone line, not an Internet service.</p><p>b. Dial-up service – Uses land lines to connect to the Internet, with speeds up to 56 kbps. Slowest.</p><p>c. Digital Subscriber Line (DSL) – Faster than dial-up, often 256 kbps to several Mbps.</p><p>d. Cable modem – Much faster, typically 10 Mbps to 1 Gbps.</p>